I have had diff. sized kaws. for years & done my own maint. Don´tskimp on oil & filter changes, i´m in Ont. so if i fire up my bike in the winter i make sure the tack & speed cables are disconected, I run only high test gas, & I keep my bikes very clean.If you need any secific tips feel free to ask. I have 3 81 ltds & a 78 kz 650. Den